package com.vasthu.gui;import java.awt.*;import java.awt.event.*;public class VstKeyAdapter extends KeyAdapter{    public void keyPressed(KeyEvent ke)    {        if (ke.getKeyCode() == KeyEvent.VK_F5)        {            System.out.println("F5 pressed");            if (VstGuiManager.get().isBillViewLoaded())            {                VstMainWindow mainWindow = VstGuiManager.get().getMainWindow();                                if (mainWindow != null)                {                    mainWindow.openAddItem();                }            }        }    }}  